How will BLM know when their protests have stopped racism?

BLM isn't about racism.  Its about power and money.  Its not about improving black lives or making them matter.  Its a political movement attempting to erase American history, American pride, American culture.

Once erased they can build Lenin, Stalin, Mao, and Pot's vision for society.

An all powerful centrally controlled state that dishes out "equality"  such as one pair of brown shoes size 7 for all citizens per year.

  "Racism" has been a worldwide problem for at least 500 years, probably much more.  I doubt that it ever could be completely stopped, as none of us can share another's subjective experiences.  We can't know another's thoughts.  I think any movement like B.L.M. has never intended to "stop" racism, but rather to limit it to the point where it ceases to adversely affect interpersonal relations.  

  Much has been done in the last 75 years worldwide, but much more can & should be done.  A great problem is religion.  So long as religions are allowed to spew such nonsense as a caste system, racism has a breeding ground.  So long as fundamentalist "Christians" can drag out passages from their "Bible" to do so, it will continue to exist.    

It's all about power and will never end.  

It certainly won't stop until people stop caving to their demands and they actually sit down and discuss rational changes that will (or should) improve their lives and quality of life.

Interestingly enough, nobody forces anyone to be racist. For people who are racist, it is a choice.

Best for people to just be aware or called out when they are.

When THEY are extinguished.

Obama was a survivor of racists who share your beliefs. There were literally dozens of Republicans who were forced to issue public apologies for racist comments, images, posts, etc. during Obama's 2 terms. BLM's mission will be complete when the police are professional, Trump is out of office, and views like yours are seen as deplorable by all those with power.

I would think by now that you would have figured out that the goal of BLM has nothing to do with ending racism.

Changing of laws and practices.

You ever sex with and without love to know it's a difference?

They wont till you do

I believe you mean "riots".